Go语言获取数组长度的方法

// getting the length of an array is silly, because the length is part of the array's static type
myArray := [3]int{1, 2, 3}
fmt.Println(len(myArray)) // prints 3
// getting the length of a slice
mySlice := []int{1, 2, 3}
fmt.Println(len(mySlice)) // prints 3